Pipe-wrench



(No Model.)

GJW. COOK.

V PIPE WRENGH. No. 283,378 Patented Aug. 21, 1883.

N. mans Halo-mm lam n (L A'rnN'r rricno GEORGE \V. COOK, OF CHICAGO,ILLINOIS.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent N0.'283,378, dated August21, 1883.

' Application filed March 24, 1 883. (NoniodeL) Ton/ll whom it mayconcern.-

Be it known that I, Gnonen W. Coon, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Pipe-Wrenches, of which thefollowing is a specification. r

The nature of the invention consists in a device which, when attached tothe common wrench,known as a monkey-wrench, forms a rod or pipe wrench;and the objects of the invention are, first, to furnish a devicewhicliis readily attached to and detached fromthe monkey -wrench,thereby utilizing the monkeywrench as a combined tool, second, tofurnish a device which'can be attached to wrenches alreadyconstructed bya slight alteration of the wrench, which can be made by any ordinarymechanic, therefore the device can be manufactured and sold separatefrom the uwcnch; third, to produce a combined wrench having otheradjustments than that had by means of the thumb-screw of themonkey-wrench, and thereby have a more convenient and reliable tool. Iaccomplish these objects by the mech anism illustrated in theaccompanying drawings, in which- Figure l is a plan view of the wrenchwith my improvement attached Fig. 2, a plan view of the upper jaw of thewrench as preparedto receive my attachment; Fig. 3, a perspective Viewof the invention when detached from the wrench; Fig. 4, a sectionthrough Fig. 1 and the pipe 5 showing the adjustment when in operation;Fig. 5, a perspective view of the dog f.

Similar letters refer to similar parts throughout the several views.

The entire attachment, as shown at Fig. 3, is made out of steel, oranysuitable metallic substance.

The elongated part B constitutes the frame of the device. In one end ofthis frame I fasten, by means of rivets or otherwise, the block as shownat O.

B; at the other end the block B". These two blocks form the bearingsupon the jaw of the are somewhat larger than the diameter of the pin, inorder that the entirebearing shall come upon the rounded part of thedog, instead of the pin, while the tool is being operated.

Upon the top of the block B I place the spri-ngj, one end of which has abearing upon the back of the dog f. By means of this spring the dog ispressed forward and brought in close contact with the pipe g,whilemaking the proper adj ustment,to prevent the dog from slipping when thewrench is being turned in the direction indicated by the arrow shown atFig. 4.

The countersunk points I) are the receptacles for the end of thethumb-screw E, by which means the attachment is held to its place whilehandling the wrench.

In operating the combined tool the device is placed upon the head of thewrench, as shown at Fig. l, the projecting tooth C being placed in oneof the notches of G, which will bringthe dog f in a positioncorresponding with the size of the'pipe to be held or turned. The pipeis then brought in contact with the dog bymeans of the movablejaw of thewrench, after which, by a slight manipulation of the thumb-screw of themonkey-wrench, and with the pressure of the spring j, some one of theteeth of the dog is readily placed at a proper angle to take a firm andreliablehold on the pipe. By turning the wrench in the directionindicated by the arrow, as shown at Fig. 4, and by a reverse motion ofthe wrench, the spring behind the dog will give sufficiently to let thewrench turn in that direction with perfect ease.

I do not confine myself to the one projection, C, as shown, on the blockB, nor to any partic ular number of the notches C, as in the larger sizetools, where more strength and greater scope of adjustment are required,two or more of these projections and an additional number of thenotcheswould be preferable. Neither do I confine myself to the thumb-screw E orthe countersunk points D, as a spring or other- Bflblock B, dog f, andspring j, thejaw A, IO

simple devices may be used instead. provided with the ratchet-notches O,operative 7 What I do claim, and desire to secure by with the projectingtooth G, substantially as Letters Patent, is and for the purposes setforth.

5 1. In combination with a monkey-wrench,

the device herein described, consisting of .the

frame B, the block B the block B, the dogf, \Vitnesses:

and the spring j, all substantially as set forth. \VM M. THEXTON,

2. In combination with the frame B, block GEo. H. HARTMAN.

GEORGE W. COOK.

